pts: iozone improve parse-results.php

1 files changed, 19 insertions, 1 deletions

diff --git a/pts/test-resources/iozone/parse-results.php b/pts/test-resources/iozone/parse-results.php
index ec1fb84..2bece97 100644
--- a/pts/test-resources/iozone/parse-results.php
+++ b/pts/test-resources/iozone/parse-results.php
@@ -1,11 +1,29 @@
 <?php
 
-$BENCHMARK_RESULTS = substr($argv[1], strrpos($argv[1], " 904800 "));
+// find the line with "reclean" on it
+$BENCHMARK_RESULTS = substr($argv[1], strrpos($argv[1], "reclen"));
+// skip to the next line
+$BENCHMARK_RESULTS = substr($BENCHMARK_RESULTS, 1+strpos($BENCHMARK_RESULTS, "\n"));
+// remove stuff after this line
 $BENCHMARK_RESULTS = substr($BENCHMARK_RESULTS, 0, strpos($BENCHMARK_RESULTS, "\n"));
+
+// break up the line into columns based on whitespace
 $BENCHMARK_RESULTS = explode(" ", $BENCHMARK_RESULTS);
 
 $R_count = 0;
 $result = 0;
+
+/* This loop picks out the result value from either the 3rd or the 5th
+   column. If both columns contain a value then the 5th column is
+   used, which is the read time. If only the 3rd column contains a
+   value then it is used as the write time.
+
+Example:
+
+    KB  reclen   write rewrite    read    reread    read   write ...
+512000       1   47591   19718   129991   106731
+*/
+
 foreach($BENCHMARK_RESULTS as $R)
 {
 	if(!empty($R))